former congresswoman gabrielle giffords and her husband captain mark kelly testified about the man who shot his wife in the head three years ago. >> the killer in the tucson shooting suffered from severe mental illness, but even after being deemed unqualified for service in the army an explulsion from pima community college he was never reported to mental health authorities. on november 30th of 2010 he walked into a sporting good store, passed a background check, and walked out with a semi automatic handgun. martha: boy, this is so central to the issue at hand right now, and is not getting the attention that it perhaps deserves. i'm joined by jonah goldberg editor at large for the national review, he's also a fox news contributor. and dr. keith ablow, a forensic psychiatrist. gentlemen, welcome. the fact that there is no intervention, that people are not reported to mental health, you know, administrators who could make some kind of judgment, perhaps, or enforce some kind of treatment is really none of these situations. if you go one by one would have happened if the gun didn't find it